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Motorola Astro Digital Spectra Digital Spectra Plus Basic 6881076c20 E Manual
Motorola Astro Digital Spectra Digital Spectra Plus Basic 6881076c20 E Manual
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6881076C20-EFebruary 3, 2003 Performance Checks: Test Mode5-5 When in the transmit test mode, DTMF modulation produces a sidetone in the speaker. All signaling types will continually modulate the transmitted signal for detection/measurement by external instruments. 5.3.3 Control Head Test Mode The control head test mode is part of the diagnostics built into the radio and is entered through the front panel programming sequence. This test mode allows you to perform button and display tests to verify proper operation. 1.Enter the control head test mode by pressing the Home button when the test mode menu, CH TEST, is displayed. Use the Mode rocker to cause the radio to display the test mode menu, CH TEST, if the display reads RF TEST. 2. Press the Mode switch to change the test mode from the RF test mode to the control head test mode ( CH TEST). NOTE:Once the CH Test has been selected by pressing Home, pressing the Mode switch will not change the control head test mode back to the RF test mode. You must turn the radio off and reenter the RF test mode as described earlier. 3. When the control head test mode is selected ( CH TEST), press the Home button. The display will show the interpreted key number. Status of the key press is indicated to the right of the key number. Figure 5-3. Rotary Control Head Key-Closure Displays (W4)Table 5-3. Signaling Types DisplayModulationDemodulationTy p e CSQ None None Carrier Squelch TPL 192Hz 192Hz Private-Line AST 1200Hz N/A ASTRO (digital) USQ None None Open Squelch XMIT BUSY Mode Volume Pwr Phon Call Sel Scan Mic Home Dim H/L Dir Mon Emer KEY 97KEY 100 KEY 99 KEY 103KEY 104 KEY 105KEY 106 KEY 107 KEY 02 KEY 96KEY 101KEY 102 KEY 04 KEY 98 PR 12/1/93EH 12/1/93
February 3, 20036881076C20-E 5-6Performance Checks: Receiver Performance Checks Figure 5-4. Pushbutton Control Head Key-Closure Displays (W5 and W7) Figure 5-5. Pushbutton Control Head Key-Closure Displays (W9) 4. Switch the radio power off temporarily to exit the test mode and return to normal radio operation. 5.4 Receiver Performance Checks Table 5-4. Receiver Performance Checks Te s t N a m eSystem AnalyzerRadioTest ConditionComments Reference FrequencyMode: PWR MON 1st channel test frequency* Monitor: Frequency error Input at RF In/OutTEST MODE, 1 CSQ output at antennaPress and hold PTT switch.Frequency error to be ± 70 Hz (VHF) ± 150 Hz (UHF) ± 150 Hz (800 MHz) Rated Audio Mode: GEN Output level: 1.0mV RF 1st channel test frequency* Mod: 1 kHz tone at 3 kHz deviation Monitor: DVM: ac VoltsTEST MODE, 1 CSQRelease PTT switch.Set volume control to 6.3 Vrms across the speaker Distortion As above, except to distortion TEST MODE, 1 CSQRelease PTT switch.Distortion < 3.0% O#Del Rcl Mode Vol MicPhon Call Sel PWRScan XMIT BUSY DIM HOME 12 3 4 Sts5 6Msg 7H/L8Mon9Dir MAEPF-24120-A KEY 97 KEY 82KEY 99KEY 100 KEY 101KEY 102 KEY 103 KEY 81 KEY 54 KEY 49 KEY 50 KEY 52 KEY 55KEY 58KEY 51 KEY 53 KEY 56 KEY 57 KEY 48 KEY 59 MIC PTT: KEY 01 MIC HUB*: KEY 06 IGN SENSE: KEY 07 * TAKE MIC OFF HOOKVIP IN 1: KEY 16 VIP IN 2: KEY 17 VIP IN 3: KEY 18KEY 96 KEY 80 KEY 83 PR 12/1/93EH 12/1/93 PR 5/9/94JP 5/9/94 XMIT BUSY 123 456 789 0DIM Pri Non Pri Emer Dir Scan Call Mode Vol Sel Home PageRpgmSite Phon H/L Lock Rcl Sql Del Sts Msg Srch KEY 54 KEY 100 KEY 99 KEY 103KEY 104 KEY 52KEY 49 KEY 50KEY 51 KEY 59KEY 53 KEY 101KEY 102 KEY 58 KEY 48 KEY 55 KEY 57 KEY 56 KEY 97 KEY 83 KEY 96 KEY 81 KEY 80 KEY 82
6881076C20-EFebruary 3, 2003 Performance Checks: Transmitter Performance Checks 5-7 5.5 Transmitter Performance Checks Sensitivity (SINAD)As above, except SINAD, lower the RF level for 12 dB SINADTEST MODE, 1 CSQRelease PTT switch.RF input to be < 0.35µV Noise Squelch Threshold (only radios with conventional system need to be tested)RF level set to 1 mV RF TEST MODE, 1 CSQRelease PTT switch.Set volume control to 3.16 Vrms across the speaker As above, except change frequency to a conventional system. Raise RF level from zero until radio unsquelches.Out of TEST MODE; select a conventional systemRelease PTT switch.Unsquelch to occur at < 0.25 µV * Test frequencies are listed in Table 5-2. Table 5-5. Transmitter Performance Checks Test NameSystem AnalyzerRadioTe s t ConditionComments Reference FrequencyMode: PWR MON 1st channel test frequency** Monitor: Frequency error Input at RF In/OutTEST MODE, 1 CSQPress and hold PTT switch.Frequency error to be ± 70 Hz (VHF) ± 150 Hz (UHF) ± 150 Hz (800 MHz) Power RF As above TEST MODE, 1 CSQPress and hold PTT switch.Refer to the Radio Specifications in the front of the manual. Voice Modulation Mode: PWR MON 1st channel test frequency** atten to –70, input to RF In/Out, Monitor: DVM, ac Volts Set 1 kHz Mod Out level for 0.025 Vrms at test set, 80 mVrms at dummy microphone inputTEST MODE, 1 CSQPress and hold PTT switch.Deviation: VHF, UHF, and 800 MHz: >= 3.6 kHz but = 3.8 kHz but
February 3, 20036881076C20-E 5-8Performance Checks: Transmitter Performance Checks PL Modulation (radios with conventional, clear mode, coded squelch operation only)Change frequency to 1st channel test frequency**; B/W to narrowTEST MODE, 1 TPLRemove modulation input from dummy microphone. Press and hold PTT switch.Deviation: VHF, UHF, and 800 MHz: >= 500 Hz but = 3.8 kHz but = 3.6 kHz but
Chapter 6 Radio Alignment Procedure 6.1 Introduction This section describes both receiver and transmitter radio alignment procedures using either of the following radio alignment software: ASTRO Digital Spectra Radio Service Software (DOS-based) ASTRO Digital Spectra and Digital Spectra Plus Tuner software (Windows-based) 6.2 RSS 6.2.1 ASTRO Digital Spectra An IBM or IBM PC-compatible computer and radio service software (RSS) are required to align the ASTRO Digital Spectra radio. Refer to the applicable RSS manual for installation and setup procedures for the software. To perform the alignment procedures, the radio must be connected to the computer, radio interface box (RIB), and a universal test set as shown in Figure 6-1. Figure 6-1. ASTRO Digital Spectra Radio Alignment Test Setup All service and tuning procedures are performed from the SERVICE menu, which is selected by pressing F2 from the MAIN MENU. Figure 6-2 illustrates how the RSS alignment SERVICE screens are organized. RIB COMPUTER INTERFACE CABLEDATA BUSY GND COMPUTER AUDIO GENERATOR SINAD METER AC VOLTMETER TX RXCOMMUNICATIONS ANALYZER AGILENT 8901B MODULATION ANALYZER COMMUNICATIONS ANALYZER (MODOUT Connector) WATTMETER MAEPF-27245-O RADIO SET TO APPROX. 80mVrms FOR MAXIMUM DEVIATION MATCHING TRANSFORMER CONTROL HEAD TEST SPEAKER DUMMY MICROPHONE RF PORT RADIO-TO-RIB CABLE RF ATTENUATOR COMMUNICATIONS ANALYZER Vert/SINAD Dist/ DVM Counter OR OR
February 3, 20036881076C20-E 6-2Radio Alignment Procedure: RSS Figure 6-2. RSS Service Menu Layout All SERVICE screens read and program the radio codeplug directly; you do NOT have to use the RSS GET/SAVE functions to use the SERVICE menus. 6.2.2 Softpot The SERVICE screens introduce the concept of the softpot, an analog SOFTware-controlled POTentiometer used for adjusting all transceiver alignment controls. Each SERVICE screen provides the capability to increase or decrease the softpot value with the keyboard UP/DOWN arrow keys respectively. A graphical scale is displayed indicating the minimum, maximum, and proposed value of the softpot, as shown in Figure 6-3. Figure 6-3. Softpot Concept Adjusting the softpot value sends information to the radio to increase (or decrease) dc voltage in the corresponding circuit. For example, pressing the UP arrow key at the Reference Oscillator screen instructs the radio’s microcomputer to increase the voltage across a varactor in the reference oscillator, which increases the frequency. In ALL cases, the softpot value is just a relative number corresponding to a digital-to-analog (D/A) generated voltage in the radio. Perform the following alignment procedures in the sequence indicated. NOTE:Some of the following screens may vary depending upon the radio under test and the version of radio service software you are using. Refer to your radio service software user’s guide. REFERENCE OSCILLATOR ALIGNMENT TRANSMIT CURRENT LIMIT TRANSMITTER ALIGNMENT MENU TRANSMIT DEVIATION BALANCE (COMPENSATION) ALIGNMENT TRANSMIT DEVIATION LIMIT ALIGNMENT F2 - F2 - F4 - F5 - F6 - SERVICE HELPF1 - EXIT, RETURN TO SERVICE MENUF10 - TRANSMIT POWER ALIGNMENTF3 - Min. ValueMax. Value 015
6881076C20-EFebruary 3, 2003 Radio Alignment Procedure: RSS6-3 6.2.3 Reference Oscillator Alignment Radios are shipped from the factory with a worst-case frequency error of ±200 Hz for VHF, ±300 Hz for UHF, and ±500 Hz for 800 MHz. These specifications are tighter than the more stringent FCC requirement of 1.5 ppm for all bands. For radios that have been in storage for over six months from the factory ship date, the reference oscillator should be checked when the radio is initially deployed to the field. It is strongly recommended that the reference oscillator be checked every time the radio is serviced or at least once a year, whichever comes first. The crystal contained in the reference oscillator naturally drifts over time due to its aging characteristic. Periodic (annual) adjustment of the reference oscillator is important for proper radio operation. Improper adjustment can result in both poor performance and interference with other users operating on adjacent channels. This test can be done with either the R-2670 Communication Analyzer or the 8901_ Modulation Analyzer. 1. Initial set up using the R-2670 Communication Analyzer: - RF Control: MONITOR - B/W: WB - Freq: RSS frequency under test - Attenuation: 20dB - Mon RF in: RF I/O - Meter: RF Display - Mode: STD - Input Level: uV or W - Display: Bar Graphs - Squelch: Mid-range or adjust as necessary 2. Initial set up using the 8901_ Series Modulation Analyzer: - Press the green Automatic Operation button on the analyzer. - Press the FREQ key. - Type 7.1 followed by the SPCL button to set the 8901_ modulation analyzer for maximum accuracy. 3. Read the radio using the RSS. 4. From the SERVICE MENU, press F2 to select the TRANSMITTER ALIGNMENT MENU. 5. Press F2 again to select the REFERENCE OSCILLATOR alignment screen ( Figure 6-4).
February 3, 20036881076C20-E
6-4Radio Alignment Procedure: RSS
Figure 6-4. Reference Oscillator Alignment Screen
6. If you are using the R-2670 Communication Analyzer, enter the frequency displayed on the
RSS screen in the “RF control” section of the R-2670. Under the “Meter” section of the
display, choose RF DISPLAY.
7. Press F6 to key the radio. The screen will indicate that the radio is transmitting.
8. Wait 5 seconds until the analyzer reading settles. Record the transmitter frequency (or note
the frequency error reading on the screen).
9. Use the Up and Down arrow keys on your computer keyboard to adjust the reference
oscillator softpot value. Allow approximately five seconds for the analyzer frequency reading
to stabilize after each change.
10. Adjust the frequency error, as indicated in
Table 6-1.
11 . P r e s s F6 again to dekey the radio.
12. Press F8 to program the new softpot value.
13. Press F10 once to return to the TRANSMITTER ALIGNMENT MENU, or press F10 twice to
return to the SERVICE MENU.
6.2.4 Transmit Power Alignment
NOTE:All power measurements are to be made at the antenna port.
NOTE:The transmitter power setting keeps the radiated power at or below the level specified in the
exclusionary clause for low power devices of IEEE Standard C95.1-1991.Table 6-1. Reference Oscillator Alignment
BandTa r g e t
VHF ±70Hz
UHF ±150Hz
800 MHz ±150Hz
MOTOROLA Radio Service Software Use UP/DOWN Arrows To Adjust Softpot.
ASTRO Model: T04SLF9PW7AN
MAIN:SERVICE:TX ALIGN:REF OSC
REFERENCE OSCILLATOR
--------------------
Frequency Current Value
--------- -------------
869.9875 72 New Softpot Value......72
Transmitter..On
0 255
MIN |----+----+----+----X----+----+----+----+----+----+----+----| MAX
F1 F2 F3 F4 F5 F6 F7 F8 F9 F10
HELP TOGGLE PROGRAM EXIT
PTT VALUE
6881076C20-EFebruary 3, 2003
Radio Alignment Procedure: RSS6-5
NOTE:The power amplifier must be firmly mounted to the transceiver for accurate power adjustment.
1. From the SERVICE MENU, press F2 to select the TRANSMITTER ALIGNMENT MENU.
2. Press F3 to select the TRANSMIT POWER alignment screen. The screen will indicate the
transmit frequencies to be used (
Figure 6-5).
Figure 6-5. Transmit Power Alignment Screen
3. Press Ta b (or Enter or Return) to select a frequency field (starting with the highest frequency
shown).
4. Press F6 to key the radio. The screen will indicate that the radio is transmitting.
5. Use the UP/DOWN arrow keys to adjust the transmit power per the values shown in
Table 6-2.
Table 6-2. Transmit Power Settings
VHF Rated Output PowerMin. LevelMax. Level
10-25W 10.5W 28W
25-50W 26.5W 56W
50-110W 54W 113W
UHF Rated Output PowerMin. LevelMax. Level
6W 6W 7W
10-25W 10.5W 28W
20-40W 20.5W 45W
78W 76W 80W
15W 16W 19W
50-110W 54W 110W
MOTOROLA Radio Service Software Use UP/DOWN Arrows To Adjust Softpot.
ASTRO Model: T04SLF9PW7AN
MAIN:SERVICE:TX ALIGN:TX POWER
TRANSMIT POWER
--------------
Current Value New Softpot Value
Frequency High Pwr Mid Pwr Low Pwr High Pwr Mid Pwr Low Pwr
--------- -------- ------- ------- -------- ------- -------
806.0125 35 35 35 10 23 23
821.0125 42 42 42 11 28 28
851.0125 50 50 50 20 33 33
866.0125 60 60 66 33 40 40
869.9875 70 70 70 43 45 45
Transmitter..On
0 127
MIN |----+----+----+----X----+----+----+----+----+----+----+----| MAX
F1 F2 F3 F4 F5 F6 F7 F8 F9 F10
HELP TOGGLE PROGRAM EXIT
PTT VALUE
February 3, 20036881076C20-E
6-6Radio Alignment Procedure: RSS
6. Press F6 to dekey the radio.
7. Press F8 to program the value.
8. Repeat steps 3-7 for the remaining frequencies.
9. Press F10 once to return to the TRANSMITTER ALIGNMENT MENU, or press F10 twice to
return to the SERVICE MENU.
6.2.5 Transmit Current Limit Alignment
1. From the SERVICE MENU, press F2 to select the TRANSMITTER ALIGNMENT MENU.
2. Press F4 to select the TRANSMIT CURRENT LIMIT alignment screen. The screen will
indicate the transmit frequencies to be used (
Figure 6-6).
NOTE:The current limit before alignment should be set to 15 (for no limiting).
Figure 6-6. Transmit Current Limit Alignment Screen
3. Press Ta b (or Enter or Return) to select a frequency field (starting with the test frequency
with the highest current drain).
4. Press F6 to key the radio. The screen will indicate that the radio is transmitting.
5. Use the DOWN arrow key to decrease the current limit relative value until the transmit power
output begins to drop.
6. Then, increase the current limit value by one increment.
7. Press F8 to program the new softpot value.
800 MHz Rated Output PowerMin. LevelMax. Level
15W 15W 20W
35W (Repeater Mode) 37W 42W
30W (Talkaround Mode) 32W 42W
Table 6-2. Transmit Power Settings (Continued)
MOTOROLA Radio Service Software Use UP/DOWN Arrows To Adjust Softpot.
ASTRO Model: T04SLF9PW7AN
MAIN:SERVICE:TX ALIGN:CURRENT LIMIT
CURRENT LIMIT
-------------
Frequency Current Value New Softpot Value
--------- ------------- -----------------
806.0125 11 11
821.0125 11 11
851.0125 11 11
866.0125 11 11
869.9875 11 11
Transmitter..On
0 15
MIN |----+----+----+----X----+----+----+----+----+----+----+----| MAX
F1 F2 F3 F4 F5 F6 F7 F8 F9 F10
HELP TOGGLE PROGRAM EXIT
PTT VALUE